<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>浅克隆</title>
</head>
<body>
    <script>
        var a=[
            4,3,[2,5],1,4
        ];
        var b=[];
        for(var i=0;i<5;i++){
                b.push(a[i]);  
        }
        document.write(b)
        console.log(a==b)
    </script>
</body>
</html>